How to add a torrent to a running rtorrent download?

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So there is a directory full of torrent files:
debian.iso.torrent
fedora.iso.torrent
I can start downloading them with a:
rtorrent *.torrent
command, when the working directory is the same where the torrents are.
But. Every time when I start rtorrent in this way it calculates all the hashes..it takes looong time do to that and it's a cpu intensive thing.
Are there any methods to avoid this? (other console-based torrent client? or a feature to add a single torrent when already downloading a torrent without calculating all the torrent's hashes?)
(HowTos)

Stories similar to How to add a torrent to a running rtorrent download?

For a project I want to do in Linux, I would need to add a torrent file to a command line torrent client and somehow retrieve the directory the files of that torrent are going to be downloaded to.

To detail the problem more: there is a directory called TorrentDownloads, where every torrent will be downloaded to (this is easy to do in the command line torrent clients I know, rtorrent and transmiss